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Photoconductivity Enhancement in Atomically Thin Molybdenum Disulfide through Local Doping from Confined Water.

ABSTRACT: Two-dimensional transition metal dichalcogenide (TMDC) materials have shown great potential for usage in opto-electronic devices, especially down to the regime of a few layers to a single layer. However, at these limits, the material properties can be strongly influenced by the interfaces. By using photoconductive atomic force microscopy, we show a local enhancement of photoconductivity at the nanoscale in bilayer molybdenum disulfide on mica, where water is confined between the TMDC and the substrate. We have found that the structural phase of the water influences the doping level and thus the tunneling barrier at the nanojunction. This leads to an increase in photocurrent and enhanced photopower generation.

SUBMITTER: Verbakel JD

PROVIDER: S-EPMC10476179 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature

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Photoconductivity Enhancement in Atomically Thin Molybdenum Disulfide through Local Doping from Confined Water.

Verbakel Jort D JD Dekker Annelies A Zandvliet Harold J W HJW Bampoulis Pantelis P

The journal of physical chemistry. C, Nanomaterials and interfaces 20230726 34

Two-dimensional transition metal dichalcogenide (TMDC) materials have shown great potential for usage in opto-electronic devices, especially down to the regime of a few layers to a single layer. However, at these limits, the material properties can be strongly influenced by the interfaces. By using photoconductive atomic force microscopy, we show a local enhancement of photoconductivity at the nanoscale in bilayer molybdenum disulfide on mica, where water is confined between the TMDC and the sub ...[more]

PMID: 37670793

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